Content-div breaks through wrapper

I don’t know what to do anymore.
At the moment, I have a wrapper around my blog’s content (floating left div) and sidebar (floating right div).
What I’m trying to do is get the footer to show below them all.

But the content div breaks through the wrapper.
Have a look: JuggonautWarning: NSFW

1. No, we do NOT delete the topic – just to erase the traces that you ever needed help 🙂
In the very first place you should have put the warning; NSFW! (I did it now)

2. hate those Validators, but I might have a look into it, once I get the layout to fully work
Wrong order 🙂 – validating usually makes the sites to work correctly cross-browser. You can hate the validator, but browsers hate as well your invalid code…